Today happens to be father's day in Finland, and I would like to know how to express that in Latin. My understanding is that ancient Romans did not have a father's day, so the question is about translation. How should I say "father's day in Latin" and why?
Dies patris is one way to put it, but perhaps dies patrius would be better. What adjective should I use if using one is better than going with the genitive? Should dies be masculine or feminine in this use? Or should I express it in some other way?